The isLesser? is a comparitive function that takes two arguments.
TIf the first is lesser than the seccond the function will return
true and if the first is greater than the seccond the function 
will return false
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(define one 1)
(define two 2)

(if(isLesser? one two)
  (write "1 < 2")
  (write "1 > 2"))
